The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_tag.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2006 Vadim Goncharov <vadimnuclight@tpu.ru>
    5  * All rights reserved.
    6  * 
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: stable/12/sys/netgraph/ng_tag.h 326272 2017-11-27 15:23:17Z pfg $
   30  */
   31 
   32 #ifndef _NETGRAPH_NG_TAG_H_
   33 #define _NETGRAPH_NG_TAG_H_
   34 
   35 /* Node type name and magic cookie. */
   36 #define NG_TAG_NODE_TYPE        "tag"
   37 #define NGM_TAG_COOKIE          1149771193
   38 
   39 /*
   40  * The types of tag_cookie, tag_len and tag_id in structures below
   41  * must be the same as corresponding members m_tag_cookie, m_tag_len
   42  * and m_tag_id in struct m_tag (defined in <sys/mbuf.h>).
   43  */
   44 
   45 /* Tag match structure for every (input) hook. */
   46 struct ng_tag_hookin {
   47         char            thisHook[NG_HOOKSIZ];           /* name of hook */
   48         char            ifMatch[NG_HOOKSIZ];            /* match dest hook */
   49         char            ifNotMatch[NG_HOOKSIZ];         /* !match dest hook */
   50         uint8_t         strip;                          /* strip tag if found */
   51         uint32_t        tag_cookie;                     /* ABI/Module ID */
   52         uint16_t        tag_id;                         /* tag ID */
   53         uint16_t        tag_len;                        /* length of data */
   54         uint8_t         tag_data[0];                    /* tag data */
   55 };
   56 
   57 /* Tag set structure for every (output) hook. */
   58 struct ng_tag_hookout {
   59         char            thisHook[NG_HOOKSIZ];           /* name of hook */
   60         uint32_t        tag_cookie;                     /* ABI/Module ID */
   61         uint16_t        tag_id;                         /* tag ID */
   62         uint16_t        tag_len;                        /* length of data */
   63         uint8_t         tag_data[0];                    /* tag data */
   64 };
   65 
   66 #define NG_TAG_HOOKIN_SIZE(taglen)      \
   67         (sizeof(struct ng_tag_hookin) + (taglen))
   68 
   69 #define NG_TAG_HOOKOUT_SIZE(taglen)     \
   70         (sizeof(struct ng_tag_hookout) + (taglen))
   71 
   72 /* Keep this in sync with the above structures definitions. */
   73 #define NG_TAG_HOOKIN_TYPE_INFO(tdtype) {               \
   74           { "thisHook",         &ng_parse_hookbuf_type  },      \
   75           { "ifMatch",          &ng_parse_hookbuf_type  },      \
   76           { "ifNotMatch",       &ng_parse_hookbuf_type  },      \
   77           { "strip",            &ng_parse_uint8_type    },      \
   78           { "tag_cookie",       &ng_parse_uint32_type   },      \
   79           { "tag_id",           &ng_parse_uint16_type   },      \
   80           { "tag_len",          &ng_parse_uint16_type   },      \
   81           { "tag_data",         (tdtype)                },      \
   82           { NULL }                                              \
   83 }
   84 
   85 #define NG_TAG_HOOKOUT_TYPE_INFO(tdtype)        {               \
   86           { "thisHook",         &ng_parse_hookbuf_type  },      \
   87           { "tag_cookie",       &ng_parse_uint32_type   },      \
   88           { "tag_id",           &ng_parse_uint16_type   },      \
   89           { "tag_len",          &ng_parse_uint16_type   },      \
   90           { "tag_data",         (tdtype)                },      \
   91           { NULL }                                              \
   92 }
   93 
   94 #ifdef NG_TAG_DEBUG
   95 
   96 /* Statistics structure for one hook. */
   97 struct ng_tag_hookstat {
   98         uint64_t        recvFrames;
   99         uint64_t        recvOctets;
  100         uint64_t        recvMatchFrames;
  101         uint64_t        recvMatchOctets;
  102         uint64_t        xmitFrames;
  103         uint64_t        xmitOctets;
  104 };
  105 
  106 /* Keep this in sync with the above structure definition. */
  107 #define NG_TAG_HOOKSTAT_TYPE_INFO       {                       \
  108           { "recvFrames",       &ng_parse_uint64_type   },      \
  109           { "recvOctets",       &ng_parse_uint64_type   },      \
  110           { "recvMatchFrames",  &ng_parse_uint64_type   },      \
  111           { "recvMatchOctets",  &ng_parse_uint64_type   },      \
  112           { "xmitFrames",       &ng_parse_uint64_type   },      \
  113           { "xmitOctets",       &ng_parse_uint64_type   },      \
  114           { NULL }                                              \
  115 }
  116 
  117 #endif /* NG_TAG_DEBUG */
  118 
  119 /* Netgraph commands. */
  120 enum {
  121         NGM_TAG_SET_HOOKIN = 1,         /* supply a struct ng_tag_hookin */
  122         NGM_TAG_GET_HOOKIN,             /* returns a struct ng_tag_hookin */
  123         NGM_TAG_SET_HOOKOUT,            /* supply a struct ng_tag_hookout */
  124         NGM_TAG_GET_HOOKOUT,            /* returns a struct ng_tag_hookout */
  125 #ifdef NG_TAG_DEBUG
  126         NGM_TAG_GET_STATS,              /* supply name as char[NG_HOOKSIZ] */
  127         NGM_TAG_CLR_STATS,              /* supply name as char[NG_HOOKSIZ] */
  128         NGM_TAG_GETCLR_STATS,           /* supply name as char[NG_HOOKSIZ] */
  129 #endif
  130 };
  131 
  132 #endif /* _NETGRAPH_NG_TAG_H_ */

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